Parity doubling in {sup 219}Th and the onset of collectivity above N=126.

Journal Article · Wed Jul 01 04:00:00 EDT 2009 · Phys. Rev. C

DOI:https://doi.org/10.1103/PhysRevC.80.011304· OSTI ID:962890

Reviol, W; Sarantites, D G; Chiara, C J; Montero, M; Janssens, R V. F.; Carpenter, M P; Khoo, T L; Lauritsen, T; Lister, C J; Seweryniak, D; Zhu, S; Pechenaya, O L; Frauendorf, S G

Excited states in {sup 219}Th have been observed for the first time in an experiment using the {sup 26}Mg + {sup 198}Pt reaction and evaporation-residue-gated {gamma}-ray spectroscopy. Two structures of interlinked alternating-parity levels with simplex quantum numbers s = {+-}i are observed, reminiscent of similar sequences in heavier odd-mass isotopes, but only three mass units away from the N = 126 neutron closed shell. The emergence of quadrupole-octupole collectivity in this mass region and the trend for parity-doublet bands are discussed.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 962890
• Report Number(s): ANL/PHY/JA-64387
• Journal Information: Phys. Rev. C, Journal Name: Phys. Rev. C Journal Issue: Jul. 2009 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
EXCITED STATES
NEUTRONS
PARITY
QUANTUM NUMBERS
SPECTROSCOPY